Unit 6: GLOBAL WARMING
LOOKING BACK
I. PRONUCIATION
1. Listen and repeat the questions paying attention to the rising intonation. 
1. Do you know that global warming is increasing?
2. Did you turn off the light before you left home?
3. Did you turn off the light before you left home?
4. Are you aware of the dangers of plastic bags on the environment?
5. Have you seen the `Young Voices for the Planet` films?





I. PRONUCIATION
2. Listen and mark the rising intonation on the echo questions (↗). Then practise reading the exchanges.
1. A: ‘Plant for the Planet’ helped plant 12 billion trees worldwide.
B: Twelve billion trees worldwide? ⤻
2. A: Even when turned off, electronic devices use energy.
B: Yes, they can still use energy. ↷
3. A: Cutting down on energy use is the best way to help reduce global warming.
B: The best way to do what? ⤻






I. PRONUCIATION
2. Listen and mark the rising intonation on the echo questions (↗). Then practise reading the exchanges.
4. A: Global warming has catastrophic effects on humans.
B: Global warming has what on humans? ⤻

5. A: A single tree can absorb about one ton of carbon dioxide during its lifetime.
B: How long can a tree live? 





II. VOCABULARY
Complete the sentences with the words in the box.





II. VOCABULARY
Complete the sentences with the words in the box.





I believe that the only way for us to reduce global warming is to cut down on  ________
Many species are threatened with ___________ due to deforestation and loss of habitat.



energy use

extinction
II. VOCABULARY
Complete the sentences with the words in the box.





3. Motor vehicles running on petrol are responsible for a large amount of carbon dioxide ________

4. There are many ways for us to reduce our ___________ in order to save our environment.




emissions

carbon footprint 
II. VOCABULARY
5. More trees should be planted as they __________ carbon dioxide and give off oxygen.

6. The alarming rate of _______________ results in damage to the quality of the land.






absorb

deforestation
II. VOCABULARY
7. Rainforests have the highest species __________ on the earth.

8. Global warming has proved truly ______________ for the environment.







diversity

catastrophic
III. GRAMMAR
1. Rewrite the sentences using perfect participles.



1. After the students had learnt about the benefits of recycling and reusing, they started collecting waste paper, bottles, and cans to recycle and reuse.


Having learnt about the benefits of recycling and reusing, the students started collecting waste paper, bottles and cans to recycle and reuse.


III. GRAMMAR
1. Rewrite the sentences using perfect participles.



2. Since Mai had refused Nam`s offer of a lift in his car, she had to walk home.



Having refused Nam`s offer of a lift in his car, Mai had to walk home.


III. GRAMMAR
1. Rewrite the sentences using perfect participles.



3. After Ha had read some documents about Green Earth, she decided to join the organisation.




Having read some documents about Green Earth, Ha decided to join the organisation.


III. GRAMMAR
1. Rewrite the sentences using perfect participles.



4. Since the farmers used too much chemical fertiliser on their farm, they now have to drink polluted water.




Having used too much chemical fertiliser on their farm. the fanners now have to drink I polluted water.



III. GRAMMAR
1. Rewrite the sentences using perfect participles.



5. After she replaced all the light bulbs in her house with LED lights, she saved a lot of money on her electricity bills.




Having replaced all the light bulbs in the house with LED lights, she saved a lot of I money on her electricity bills.



III. GRAMMAR
1. Rewrite the sentences using perfect participles.



6. Since we have become too dependent on the use of electricity, we have to find alternative sources of energy before fossil fuels run out.





Having become too dependent on the use of electricity, we have to find alternative sources of energy before fossil fuel runs out.


III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



1. Tonya had dumped a lot of rubbish on the beach. She was strongly criticized for that.




Tonya was strongly criticized for having dumped a lot of rubbish on the beach.


III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



2. Sam had not worked hard enough in his previous job. He regretted it.





Sam regretted not having worked hard enough in his previous job.


III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



3. Tony had rescued the kids from the fire. People admired him for that.



People admired Tony for having rescued the kids from the fire.



III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



4. I have seen him before. I remember that.


I remember having seen him before.


III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



5. `You`ve lied to us,` the villagers said. The politician denied it.

The politician denied having lied to the villagers.


III. GRAMMAR
2. Combine the sentences using perfcct gerunds.



6. Thanh had forgotten to turn off the gas cooker before he left his house. He admitted that.

Thanh admitted having forgotten to turn off the gas cooker before leaving the house/before he left his house.


IV. HOMEWORK
Do the exercises again
Prepare next lesson